The radio-play censors appear to have succumbed to this, in airplay versions of Aerosmith's "Janie's Got A Gun": in a song about Parental Incest, the one line they feel obliged to alter is "put a bullet in his brain". Right, that's the one thing about the song that makes its subject matter mature...
The Beatles did this deliberately in many of their interviews.
Press: Does it bother you that you can't hear what you sing during concerts?
John Lennon: No, we don't mind. We've got the records at home.
In "Uneasy Rider" by the Charlie Daniels Band, the singer accuses another man of everything from being an undercover FBI agent to having a Commie flag tacked up on the wall of his garage. The man's rebuttal to this last charge is to deny that he has a garage.
"A man is lying on the street Some punk's chopped off his head And I'm the only one who stops to see if he's dead Turns out he's dead"
Jaron and the Long Road to Love gives us this gem in "Pray for You":
Haven't been to church since I don't remember when Things were goin great, til they fell apart again I listened to the preacher as he told me what to do He said you can't go hating other who have done wrong to you Sometimes we get angry but we must not condemn Let the good Lord do his job and you just pray for them (beat) I pray your brakes go out running down a hill...
Jim Steinman's monologue "Love and Death and an American Guitar", released on the Meat Loaf album Back Into Hell as "Wasted Youth", catalogues the adventures of a boy who murders people with his guitar. Finally, he attacks his parents:
"... and just as I was about to bring the guitar crashing down upon the centre of the bed, my father woke up screaming 'Stop! Wait a minute! Stop it, boy! That's no way to treat an expensive musical instrument!"
Comes up at the end of The Lonely Island's "I Threw It On the Ground"; The singer is an over-the-top Jerk Ass who keeps throwing things people give him on the ground because of his Hair-Trigger Temper leading him to proclaim he's "not part of your system!" When his behavior pisses off a pair of actors who proceed to taze him for it, he concludes "the moral of this story is...you can't trust the system, man!"
The Velvet Underground's song "Sister Ray". The narrator's entire reaction to somebody getting shot is "You shouldn't do that/Don't you know you'll stain the carpet."